Kikusui PLZ-U Series User Manual

A-10 Appendix PLZ-U
A.2.5 Operation of the CR+CV Mode
The PLZ-U allows you to add CV mode to CR mode.
■ CR+CV mode operation
When the PLZ-U is used in CR+CV mode, the PLZ-U operates as a constant resis-
tance load and a constant voltage load (shunt regulator) as shown in Fig. A-12.
When operating as a constant resistance load and the voltage (V
M
) of the constant-
voltage power supply is varied, the PLZ-U supplies current to meet I=V/R accord-
ing to the specified resistance R. When operating as a constant voltage load and V
M
is greater than V, the input voltage V is kept constant even when the input current I
varies. Current does not flow when V
M
is less than or equal to V.
The switching between the modes is automatic.
Fig. A-12 Equivalent circuit of the CR+CV mode and operation
■ Transition of the operating point: Overpower protection (OPP)
We will consider the case when checking the discharge characteristics of a battery
of Fig. A-12.
Fig. A-13 Transition of the operating point in CR+CV mode (OPP trip point)
I
V
Resistance (V/I) is constant even when
the voltage and current change
0
R
V
M
Battery
PLZ-U Series
Input current I
Input voltage V
Voltage is constant even when
the current changes
V
R
1
VM
VQ
Q
S
Constant power line
(OPP setting)
Constant voltage line
(Constant voltage setting)
OPP trip point
M
N
IN
IOCP
M1
M2
PN
PN1
RM1
RM2
RN
Constant resistance line
(Constant resistance settings:
R
M1, RM2, and RT)
Input voltage [V]
Input current [A]
Logarithmic scale
Operating area

Kikusui PLZ-U Series Specifications

General

Brand	Kikusui
Model	PLZ-U Series
Category	Control Unit
Language	English